Means for smoothing the edges of coated boards



March 4, 1941. J SNYDER 2,233,854

' MEANS FOR smoownme THE EDGES OF COATED BOARDS Filed May 1, 1939 7 INVENTOR. /zazwr c1 JNYDEE ATTORNEYJ- Patented Mar. 4, 19 41 PATENT OFFICE 2,233,854 mums roa smoornmo rm: EDGES or ooa'rsn noaans Gilbert J. Snyder, South Bend, lnd., assignor, to Mastic Asphalt Corporation, South Bend, lnd., a corporation of Indiana Application May -1, 1939, Serial No. 271,065

10 Claims.

This invention relates tomeans for smoothin the edges of coated boards, and particularly to means for smoothing the edges of composition board coated with plastic waterproofing material and surfaced with mineral particles or grit to form building covering material.

In the manufacture of building covering material, composition board units' are moved in horizontal position mounted on a conveyor to be coated, thence to have the coating spread and leveled thereon. thence covered with grid, and thence pressed to imbed the grit and imprint the coated surface. The operations result in uneven edges of coating. sticking to the board. The composition board, especially in the manufacture of siding, .is preferably provided with reduced thickness marginal ship-lap flanges or edge portions adapted to flt snugly relative to compleo mentary flanges of adjacent board units to insure a tight sealed joint between coplanar boards. It is thus essential that the edges of the coated boards be smooth, since rough edges will prohibit a tight sealed joint as above described. 25 Heretofore the operation of smoothing the edges has been manually performed. as by scraping the excess material from the edges. The manual operation is time-consuming, and results inremoval of coating which, if smoothed, would facilitate 30 formation of a sealed joint. Also, coating will frequently flow around the edges of the board and adhere to the uncoated bottom face thereof during processing, and thereafter cause contig uous boards in a package to stick together and 35 thus ruin the masonry-simulating coating.

It is therefore the primary object of this invention to provide means for automatically smoothing at least the leading edge of a coated panel.

ing machine having a conveyor, with a flat shiftable member normally positioned transverse of and intersecting the path of movement inwhich said board iscarried by said conveyor, and adapted to be shifted to inoperative position by said board.

A further object is to provide novel means for scraping the bottom uncoated face of a board to remove overflow coating therefrom.

Other objects will be apparent from the description and appended claims.

In the drawing:

Fig. l is a fragmentary top plan view of a machine provided with my improved device.

A further object is to provide a board process:

Fig. 2 is a fragmentary side elevation of themachine and my improved device, with parts in section. i

Fig. 3 is a fragmentary side elevation of a modiiied embodiment of my invention.

Fig. 4 is a fragmentary side elevation of th 5 modified embodiment shown in Fig. 3.

Referring to the drawing, numeral i0 designates the frame of a board processing machine which mounts a bearing ll journaling a shaft l2 mounting sprockets l3 over which run a pair of l substantially horizontal chains ll. The opposite ends of a pusher bar I! are secured to opposite chains- I4, and said bar l5 extends transversely of said chains.

The composition board It processed in said 15 machine has reduced thickness marginal flange or edge portions of which the overlapping flange I1 is preferably positioned foremost and the underlapping or rearwardly oil-set flange I8 is positioned rearmost. Board I6 is provided with a suitable'waterproof decorative coating I9 as it passes through the processing machine. For example, coating it! may comprise a layer of asphalt surfaced with mineral particles or grits. To form a masonry-simulation, coating i9 is 25 preferably provided with a plurality of narrow elongated grooves or depressions which outline a masonry pattern, such as brick faces 2|.

Incident to applying and impressing coating IS, a certain amount of the-coating generally runs over the edges of the board at 22 and produces an irregular or uneven edge surface which must be smoothed.

My improved device is intended primarily to smooth the irregular edge 22 at the leading panel 'edge, preferably that of overlapping flange ll.

Base I. projects beyond bearing II, and on this projecting end I mount a pair of upright supports or brackets 25 adapted to journal the ends of a shaft 26 extending transverse of the frame I! and positioned below the level of'the'upper runs of chains l4. Fixedly mounted on shaft 26 is a flat metal plate 21 which carries a weight 28 normally holding said plate 21 in vertical position. Plate 21 is of a length greater than the width of board It, and its upper end projects above the level of the path of movement of board II on chains ll.

Rearwardly of brackets 25 I mount upright brackets 29 on frame III to terminate below the path of movement of board it. On these brackets 29 I mount a burner 30, preferably a gas pipe having a plurality of jets or openings directed angularly upwardly toward plate 21, as illustrated by the flame 3| in Fig. 2.

by conveyor chains I 4 and pusher I5, it strikes the upperend of plate 21 which has been heated. I

The weight 28 resists the pivoting of plate 21, so that the heated plate smooths out the irregular edge coating22, the heat of plate 2! preventing sticking of the coating thereto. Then, as movement of pusher l5 continues, board I6 is propelled thereby and tilts or pivots plate 2! to the dotted line position in Fig. 2, whereupon the board slides over said tilted plate. heated plate also serves to scrape the bottom of board [6 to remove any coatingwhich may have adhered thereto incident to flow of coating from the board during its coating, leveling and impressing by the machine. The parts are so positioned that the upper end of plate 21 overlies the heating element 30 when tilted. Thus the plate is directly subjected to heating during each tilting thereof, and the plate also serves as a barrier preventing the heating element from board strikes it. The boards are preferably spaced apart on the conveyor chains M a distance greater than the distance between shaft 26 and the upper edge of plate 21 to permit resumption of normal position of plate 21. The character of weight 28 is such that it will produce its desired positioning function, and yet be substantially lighter than the board so that it will not cause displacement of the board or prevent full positioning thereof over the heating element to be heated thereby and to perform its function of protecting the board from bumin or injury by the heating element.

In the modified embodiment in Figs. 3 and 4 the same function of edge smoothing is obtained by a modified construction. The brackets 25 journal shaft 26 mounting normally vertical plate 21 in the same manner as in the preferred construction, but are spaced closely adjacent the sprocket l3. At one end of shaft 26 in laterally spaced relation to the path of movement of slab 16 on conveyor chains I4 is fixedly mounted a disc 35 having a notch therein. A roller 35 normally seats in the notch of disc 35 when plate 21 is vertically positioned. Roller 36 is mounted on one end of an arm 3! which is pivoted intermediate its ends at 38 by a member carried by one of the brackets 25. The opposite end of arm 31 has a coil spring 39 connected thereto at one end, with the opposite end of said spring connected to bracket 25. Plate 21 terminates adjacent shaft 26, and has only an arm 40 projecting therebelow, and this arm is adapted to extend into the path of movement of a bar 4| connecting chains M as it passes adjacent sprockets l3.

The operation of this modified embodiment is as follows: In normal position of the parts, plate 21 extends vertically upright and is held in upright position by spring pressed seating of roller 36 in the notch of disc 35. As a coated board l6 is propelled by the chains l4 its leading edge strikes plate, 21 to be smoothed thereby upon impact therewith. Continued movement of the board by the conveyor pivots the plate 21 by overcoming the locking tension of spring 39 on roller 3B. Thereafter the roller rolls on disc 35 to restrain free rotation thereof. After the board l6 Thus the next succeeding board is conveyed in adjacent re? lation thereto, bar 4| carried by chains I4 rearwardly of each pusher l5 engages the arm 40' and pivots .the same and plate 21 back to normal vertical position. The heating element 30, as shown in Fig. 2 also may be employed with this modified embodiment, as will be obvious.

I claim:' v

1. The combination with apparatus for coating a'rigid board including means for conveying a board, of a plate, pivot meansmounting said plate below the path of movement of said board,

and means for normally positioning said plate vertically to intersect the path of movement of said board.. 4

2. The construction defined in claim 1, wherein said positioning means constitutes a counterweight lighter than said board to permit said i board to tilt and ride over said plate.

3. The construction defined in claim- 1, and a heating element positioned adjacent said plate and below the path of movement of the board to be overlaid by the upper end of said plate when tilted by a board passing thereover.

4. The combination with apparatus for coating a rigid board including a board conveyor, of a normally vertical abutment member pivoted to said apparatus and intersecting "the path of movement of said board on said conveyor to smooth the'leading edge of said board and means for normally positioning said abutment member vertically.

5. The combination defined in claim 4, and heating means carried by said apparatus, said abutment member being tilted adjacent to said heating means by said board when propelled by said conveyor.

6. The combination with board coating ap aratus including a horizontal conveyor and a fr me, of a pair of brackets mounted on said frame adjacent the end. of said conveyor, an. abutment member extending transversely of said frame and pivoted by said brackets, said abutment member intersecting the path of travel of a board on said conveyor, and means for normally operatively positioning said abutment member but yielding to permit pivoting thereof upon impact of said board therewith.

'7. The construction defined in claim 6, and

' heating means positioned adjacent to and'rearwardly-of said pivot,-said abutment member being positioned adjacent to and within the influence of said heating means when pivoted.

8. The combination with board coating apparatus including a frame and a conveyor, of an abutment member extending transversely of and pivoted to said frame and normally intersecting the path oftravel of a board on said conveyor, spring pressed means normally releasably looking said member in operative'position, and means carried by said conveyor for intermittently shifting said member from tilted to operative position.

9. The combination with board coating apparatus having a frame and a conveyor, of a member pivoted on said frame and adapted to be abutted by a board on said conveyor, a notched disc carried by said member concentric with its pivot, a spring pressed element normally seated in the notch of said disc to releasably lock said member in operative position, said board being adapted to tilt said member to inoperative position against the action of said element, and means on said conveyor engaging said member to return the member to operative position.

10. The combination with board coating apparatus having a frame and a conveyor, 9, normally vertical plate, means carried by said frame for pivoting said plate transversing of and below and adjacent said conveyor, said piate having a downwardly projecting arm, a disc concentric with said plate and fixed relative to said plate, said disc having a notch, a spring pressed lever pivoted to said frame and journaling a roller adapted to seat in said notch, and means carried by said conveyor and engaging said arm when said plate is in inoperative position to return the same to operative position.

GILBERT J. SNYDER. 

